100% renewable ethoxylated surfactants / Steven Y. Chan in COATINGS WORLD, Vol. 23, N° 8 (08/2018)  

[article]  inCOATINGS WORLD > Vol. 23, N° 8 (08/2018) Titre : 100% renewable ethoxylated surfactants Type de document : texte imprimé Auteurs : Steven Y. Chan, Auteur ; Nathan Noyes, Auteur Année de publication : 2018 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Biosurfactants Éthoxylation alcools et phénols, généralement pour produire de puissants agents surfactants ou mouillants. Micelles Oxyde d'éthylène L'oxyde d'éthylène, ou 1,2-époxyéthane, oxyde de diméthylène, oxacyclopropane, ou encore oxirane est un composé organique, le plus simple de la classe des époxydes. Il est important pour l'industrie chimique, entre autres dans la production d'éthylène glycol, ainsi que dans les industries pharmaceutique et agroalimentaire. Ressources renouvelables Structure chimique Surfactants -- Synthèse Index. décimale : 667.9 Revêtements et enduits Résumé : As consumer awareness of the products and chemicals they use rises, many chemical companies are also striving to become more environmentally responsible. The trend in the coatings industry is toward low/zero VOC products, and many innovations in coatings technology are based on sustainable or green chemistries. The market increasingly demands the use of renewable ingredients to reduce the carbon footprint, and many chemical and coating manufacturers are striving to become more environmentally responsible. This trend is driven by a number of factors, including evolving consumer perceptions and awareness regarding the products and chemicals they use, regulatory/certification bodies and programs such as USDA BioPreferred®, and the growing implementation of corporate sustainability initiatives. Bio-based ethylene oxide (EO) will meet this demand by enabling the synthesis of various ethoxylated surfactants and emulsifiers which are 100% bio-based. Ethoxylation is a common process used to generate a range of products for emulsification and wetting, including ethoxylated alcohols, carboxylic acids and esters. While the hydrophobic portions of many of these surfactants are already naturally sourced from plant oils, only petrochemical-derived EO has been available in North America until this time. With the production of bio-based EO in the near future, ethoxylated products can now be produced from 100% bio-based content, allowing customers to choose fully renewable products without sacrificing performance. In addition, by incorporation into synthetic base materials, the bio-based content can be significantly increased, allowing formulators to meet challenging new targets. Note de contenu : - Surfactant fundamentals - The issue of petroleum feedstocks - USDA bio - Preferred program - Renewable surfactants - Fig. 1 : General surfactant structure - Fig. 2 : pherical micelle of surfactant in water - Fig. 3 : Surfactant classification - Fig. 4 : Global greenhouse gas emission - Fig. 5 : The carbon dioxide cycle - Fig. 6 : Minimum bio-based content for USDA BioPreferred program - Fig. 7 : Illustration of oleochemical derivatives - Fig. 8 : BrijTM surfactant – C12 linear alcohol ethoxylate - Fig. 9 : TweenTM 20, ethoxylated sorbitol - Fig. 10 : MyrjTM, ethoxylated fatty acids and CrodafosTM, ethoxylated phosphate esters - Fig. 11 : New Bio-based EO plant in Delaware - Fig. 12 : Petroleum-based and bio-based processes for ethylene oxide - Fig. 13 : Flow diagram of an integrated Ethanol-to-EO/EG Process - Fig. 14 : 100% renewable surfactant En ligne : https://www.coatingsworld.com/issues/2018-08-01/view_features/100-renewable-etho [...] Format de la ressource électronique : Html Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32516 [article]

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Application of nonionic gemini aliphatic polyurethane surfactant for improving the performance of vegetable tanned leather / Shuangquan Lai in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXIV, N° 11 (11/2019)  

[article]  inJOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXIV, N° 11 (11/2019) . - p. 403-412 Titre : Application of nonionic gemini aliphatic polyurethane surfactant for improving the performance of vegetable tanned leather Type de document : texte imprimé Auteurs : Shuangquan Lai, Auteur ; Yong Jin, Auteur ; Liangjie Shi, Auteur ; Shenghua Wang, Auteur ; Heng Yang, Auteur Année de publication : 2019 Article en page(s) : p. 403-412 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Acide polyacrylique Agents de tannage Collagène Cuirs et peaux -- Analyse Cuirs et peaux -- Propriétés mécaniques Cuirs et peaux -- Propriétés organoleptiques Morphologie (matériaux) Photostabilité Polymères -- Synthèse Polymères aliphatiques Retannage Surfactants Surfactants -- Synthèse Tannage végétal Température de retrait Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : Vegetable tanned leathers with good embossing, air permeability, natural look and pleasing firm handle properties have applied in many goods with multiple uses. However, the performances of vegetable tanned leathers still need a further improvement. In this work, a kind of nonionic gemini aliphatic polyurethane surfactants (GPUs) with different hydrophobic chain lengths as a retanning agent combined with polyacrylic acid (PAA) for condensed tannin tanned leathers to improve their performances. The effects of the alone or combined use of the PAA and GPU, the hydrophobic chain length of GPU, and the offer percentage of retanning agent were studied by evaluating the organoleptic properties, shrinkage temperature, mechanical properties of the obtained leathers. The best performance was found in the leather retanned with PAA and 12-GPU-550 complex retanning agent, and the mechanical properties of leather could be improved when the total offer percentage was controlled at 4 wt%. Moreover, the collagen fibers morphologies and lightfastness properties of leathers retanned with different retanning agents were investigated. The results showed that the total color difference ΔE and the yellowness index Δb decreased significantly with the introduction of 12-GPU-550, and the leather retanned with PAA and 12-GPU-550 complex retanning agent showed the lowest value of ΔE, demonstrating that the lightfastness properties were improved significantly. Therefore, it was an attractive way to combine use of PAA and 12-GPU-550 as complex retanning agent, which can improve the mechanical and lightfastness properties of vegetable tanned leathers simultaneously. Note de contenu : - MATERIALS AND METHODS : Materials - Synthesis of polyacrylic acid (PAA) - Synthesis of nonionic gemini aliphatic polyurethane surfactants (GPUs) - Application of the synthesized retanning agents - The organoleptic and physical mechanical properties of leathers - Scanning Electron Microscopy analysis of leathers - Light fastness properties of leathers - RESULTS AND DISCUSSION : Effects of different retanning agents on the properties of leathers - Effect of the hydrophobic chain length of GPU on the properties of leathers - Effect of the offer percentage of complex retanning agent on the properties of leathers - SEM analysis of leathers - Effects of retanning agents on the lightfastness properties of leathers En ligne : https://drive.google.com/file/d/1ajQdsq8W9LW8sFu6kytH1lIoq_J-RMzI/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33252 [article]

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Hyperbranched polymer surfactant : synthesis, characterization and surface tension activity / Ren Longfang in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

[article]  inJOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 3 (Année 2021) . - 11 p. Titre : Hyperbranched polymer surfactant : synthesis, characterization and surface tension activity Type de document : texte imprimé Auteurs : Ren Longfang, Auteur ; Zheng Tang, Auteur ; Taotao Qiang, Auteur ; Guoguo Zhang, Auteur Année de publication : 2021 Article en page(s) : 11 p. Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Chlorure d'acide gras Concentration micellaire critique Polymères ramifiés Surfactants -- Synthèse Tension superficielle Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : A series of hyperbranched polymer surfactants (HBP-C8, HBP-C12 and HBP-C16) were synthesized by the reaction between hydroxyl-terminated hyperbranched polymers (HBP) and fatty acyl chloride. The structure of obtained hyperbranched polymer surfactant was characterized by FTIR, NMR and GPC. The results showed that the products have amphiphilic structure. The thermal property of the hyperbranched polymer surfactant investigated by DSC and TGA was strongly influenced by the length of end alkyl chain. Surface activity of hyperbranched polymer surfactant was analyzed by surface tension method and UV spectrophotometry, respectively. The results showed that hyperbranched polymer surfactant took on better surface activity, which can effectively reduce the surface tension of the water. The hyperbranched polymer surfactant has a lower critical micelle concentration (CMC) and displays single molecular micellar properties, which can package small hydrophilic molecules in relatively low concentration. Note de contenu : - EXPERIMENTAL : Materials - Synthesis of hyperbranched polymer surfactant - Testing and characterization - Surface tension activity of HBP-C - Critical micelle concentration (CMC) of HBP-C - RESULTS AND DISCUSSION : Characterization of HBP-C - Optimization of HBP-C - Grafting rate of HBP-C - Thermal properties of HBP-C - Surface tension of HBP-C - CMC of HBP-C - Table 1 The grafting rate of HBP-C - Table 2 GPC results of HBP-C DOI : https://doi.org/10.1186/s42825-020-00049-6 En ligne : https://link.springer.com/content/pdf/10.1186/s42825-020-00049-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37473 [article]

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Specialty chemicals from gum rosin / Arundhati Panda in PAINTINDIA, Vol. LXII, N° 9 (09/2012)

[article]  inPAINTINDIA > Vol. LXII, N° 9 (09/2012) . - p. 49-64 Titre : Specialty chemicals from gum rosin Type de document : texte imprimé Auteurs : Arundhati Panda, Auteur ; Rakhshinda Panda, Auteur ; Himadri Panda, Auteur ; Kavita Prakash, Auteur Année de publication : 2012 Article en page(s) : p. 49-64 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Biopolymères Biosurfactants Colophane La colophane est le résidu solide obtenu après distillation de la térébenthine, oléorésine (appelée aussi gemme), substance récoltée à partir des arbres résineux et en particulier les pins (le genre Pinus) par une opération que l'on appelle le gemmage. La colophane est solide et cassante à température ambiante. Sa couleur va du jaune très clair au quasi noir en fonction essentiellement de la conduite de la distillation, la couleur ou grade est défini par une échelle de lettre allant de D pour le plus foncé à X pour le plus clair. La colophane ne fond pas mais se ramollit avec la chaleur, son point de ramollissement se situant autour de 70 °C. Cette résine a les propriétés de coller et d'imperméabiliser. Elle fait partie des liants utilisés dans les antifoulings. La colophane est composée à 90% d’un mélange d’acides organiques de la famille des diterpènes appelés acides résiniques, qui répondent à la formule brute C20H30O2. Ces acides résiniques sont des isomères. La proportion des différents acides résiniques dans la colophane est variable suivant l’espèce de pin à partir de laquelle la colophane a été obtenue. Certains acides ne sont présents que chez certaines espèces (et leur sont donc caractéristiques). La colophane (ou « rosine ») a de nombreux usages. On la trouve notamment dans les peintures antifouling où elle se substitue au tributylétain interdit. C'est un irritant et un allergisant pour la peau et les voies respiratoires, sous forme pure ou par ses produits de dégradation. Gommes et résines Ressources renouvelables Surfactants -- Synthèse Index. décimale : 667.9 Revêtements et enduits Résumé : Synthesis of new polymeric materials from renewable natural resources has become a rapidly growing area, as these materials could potentially replace or partially replace environmentally and energy unfavorable plastics derived from petroleum chemicals. However, applications of renewable polymers are significantly behind petroleum-derived polymers, partially because of relative high cost and limitations in the monomers from renewable resources is essential. We have tried to produce different low cost products in the field of surfactants. Note de contenu : - Synthesis of rosin-based surfactants - Synthesis of cationic surfactants - Rosin acid-based ester quarternary ammonium salts - Dehydroabietylamine derived quarternary ammonium salts - Synthesis of anionic surfactants - Synthesis of zwitterionic surfactants - Synthesis of nonionic surfactants - Physical properties - APPLICATIONS : Paper sizing and the rubber industry - Antibacterial activity - Corrosion inhibition - Chiral catalyst - Chiral separation - Material synthesis Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=16260 [article]

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Study on the synthesis and surface activities of novel alkyl sulfonate eemini surfactants / X. Li in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 4/2010 (07-08/2010)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 47, N° 4/2010 (07-08/2010) . - p. 243-247 Titre : Study on the synthesis and surface activities of novel alkyl sulfonate eemini surfactants Type de document : texte imprimé Auteurs : X. Li, Auteur ; S. Zhao, Auteur ; Z. Hu, Auteur ; H. Zhu, Auteur ; D. Cao, Auteur Année de publication : 2010 Article en page(s) : p. 243-247 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants -- Synthèse Tension superficielle Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Three novel dialkyl disulfonate gemini surfactants (Cn-6-Cn, n = 6, 8, 12; n is carbon number of hydrophobic chain) were synthesized from cyanuric chloride, aliphatic amine and taurine. The chemical structures of the prepared compounds were confirmed by 1H NMR, 13C NMR, IR spectra and ESI-MS. Their critical micelle concentrations (CMC) in the aqueous solutions at 25°C were determined by surface-tension method. With the increasing length of the hydrophobic carbon chain, the values of their CMC decreased. The surface tension measurements of Cn-6-Cn give low CMC, great efficiency in lowering the surface tension, and strong adsorption at air–water interface. In addition, adsorption and micellization behavior of Cn-6-Cn were estimated by the parameter of pC20, the minimum average area per surfactant molecule (Amin). Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9804 [article]

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Surfactants with short fluorocarbone chains / E. Claus in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 200, N° 4552 (09/2010)  

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Synthèse et analyse de quelques propriétés physico-chimiques de nouvelles phosphobétaines neutres à distance intercharge modulable. / Laurent Germanaud / 1984

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Synthèse de tensioactifs biosourcés issus de polysaccharides anioniques / Thierry Benvegnu in L'ACTUALITE CHIMIQUE, N° 484-485 (05-06/2023)  

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Synthesis and application of non-bioaccumulable fluorinated surfactants : a review / Rong Zhou in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 3 (Année 2021)  

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Synthesis and application of nonionic Gemini surfactants based on grape seed oil / Kangwei Si in COLORATION TECHNOLOGY, Vol. 140, N° 1 (02/2024)  

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Synthesis and application of novel glucose derived nonionic gemini surfactant / Zhiwei Xu in COLORATION TECHNOLOGY, Vol. 138, N° 5 (10/2022)  

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Synthesis and interfacial properties of novel imidazoline gemini surfactants / W. Li in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 1 (01-02/2012)

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Synthesis and properties of sodium mono-alkylamide maleate surfactants / Fu Han in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 4 (07-08/2012)

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Synthesis and properties of three series amino acid surfactants / Weihong Qiao in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 2 (03-04/2012)

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Synthesis and Surface Properties of Trisiloxane-modified Oligo(ethylene oxide) / G. Y. Wang in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 4/2009 (07-8/2009)

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Synthesis, characterization, and kinetic study of two new cationic surfactants / Mohammad Edrissi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 4/2011 (07-08/2011)

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Synthesis, characterization and surface activity of trioctyl hydroxyethyl ammonium chloride / Y.-L. Li in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 4/2011 (07-08/2011)

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Synthesis, characterization and thermodynamic parameters of anionic gemini surfactants with different spacer groups / H. El-sharkawy Ali in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 5/2007 (10-11/2007)

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Synthesis of 1,1,1-triethoxycarbonyl-3- [2-(F-alkyl)-ethyl]propanes and 1,1,q,q-tetraalkoxycarbonyl-1,q-di-[2-(F-alkyl)-ethyl]alcanes as precursors of anionic surfactants / H. Trabelsi in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 4/2010 (07-08/2010)

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Synthesis of Cationic Surfactant Intermediates 3-(dimethylamino)-propane-1,2-di-alkylcarbamate / S.-M. Zhang in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 4/2009 (07-8/2009)

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